I use the brush tool a lot... When I use to use it I would select the brush then select the brush tool I wanted to use like Iris Enhance. I then would go to the picture and click on the eye. A dot would appear to show me I was using the tool. Then I could edit... No dot appears now and nothing changes on the picture.. My assumption is something changed that needs to be changed back,,,,, PLEASE HELP!!

ok now When I select a tool to use the brush with the dot shows up... When I highlight the area I want to adjust it shows pink... then when i hit done the pink goes away and no changes have been made....